v/vlib/builtin/builtin.v

324 lines
7.0 KiB
V

// Copyright (c) 2019-2020 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
module builtin
__global (
g_m2_buf byteptr
g_m2_ptr byteptr
)
type FnExitCb = fn()
fn C.atexit(f FnExitCb) int
pub fn exit(code int) {
C.exit(code)
}
// isnil returns true if an object is nil (only for C objects).
pub fn isnil(v voidptr) bool {
return v == 0
}
/*
fn on_panic(f fn(int)int) {
// TODO
}
*/
// print_backtrace shows a backtrace of the current call stack on stdout
pub fn print_backtrace() {
// at the time of backtrace_symbols_fd call, the C stack would look something like this:
// 1 frame for print_backtrace_skipping_top_frames
// 1 frame for print_backtrace itself
// ... print the rest of the backtrace frames ...
// => top 2 frames should be skipped, since they will not be informative to the developer
print_backtrace_skipping_top_frames(2)
}
// panic_debug - private function that V uses for panics, -cg/-g is passed
fn panic_debug(line_no int, file string, mod string, fn_name string, s string) {
// NB: the order here is important for a stabler test output
// module is less likely to change than function, etc...
// During edits, the line number will change most frequently,
// so it is last
eprintln('================ V panic ================')
eprintln(' module: $mod')
eprintln(' function: ${fn_name}()')
eprintln(' message: $s')
eprintln(' file: $file')
eprintln(' line: ' + line_no.str())
eprintln('=========================================')
$if exit_after_panic_message ? {
C.exit(1)
}
if !should_use_native_backtraces() {
print_backtrace_skipping_top_frames(1)
}
$if panics_break_into_debugger ? {
break_if_debugger_attached()
}
C.exit(1)
}
// panic prints a nice error message, then exits the process with exit code of 1.
// It also shows a backtrace on most platforms.
pub fn panic(s string) {
eprintln('V panic: $s')
$if exit_after_panic_message ? {
C.exit(1)
}
if !should_use_native_backtraces() {
print_backtrace_skipping_top_frames(1)
}
$if panics_break_into_debugger ? {
break_if_debugger_attached()
}
C.exit(1)
}
fn should_use_native_backtraces() bool {
mut res := false
$if panics_break_into_debugger ? {
$if tinyc {
// recent versions of tcc print nicer backtraces automatically
res = true
}
}
return res
}
// eprintln prints a message with a line end, to stderr. Both stderr and stdout are flushed.
pub fn eprintln(s string) {
// eprintln is used in panics, so it should not fail at all
if s.str == 0 {
eprintln('eprintln(NIL)')
}
C.fflush(C.stdout)
C.fflush(C.stderr)
C.write(2, s.str, s.len)
C.write(2, c'\n', 1)
C.fflush(C.stderr)
}
// eprint prints a message to stderr. Both stderr and stdout are flushed.
pub fn eprint(s string) {
if s.str == 0 {
eprint('eprint(NIL)')
}
C.fflush(C.stdout)
C.fflush(C.stderr)
C.write(2, s.str, s.len)
C.fflush(C.stderr)
}
// print prints a message to stdout
pub fn print(s string) {
C.write(1, s.str, s.len)
}
const (
new_line_character = '\n'
)
//#include "@VROOT/vlib/darwin/darwin.m"
//fn C.nsstring2(s string) voidptr
//fn C.NSLog(x voidptr)
//#include <asl.h>
fn C.asl_log(voidptr, voidptr, int, charptr)
pub fn println(s string) {
$if windows {
print(s)
print(new_line_character)
} $else {
// For debugging .app applications (no way to read stdout) so that it's printed to macOS Console
/*
$if macos {
C.asl_log(0, 0, C.ASL_LEVEL_ERR, s.str)
}
*/
// TODO: a syscall sys_write on linux works, except for the v repl.
// Probably it is a stdio buffering issue. Needs more testing...
// $if linux {
// $if !android {
// snl := s + '\n'
// C.syscall(/* sys_write */ 1, /* stdout_value */ 1, snl.str, s.len+1)
// return
// }
// }
C.printf('%.*s\n', s.len, s.str)
}
}
__global (
total_m = i64(0)
nr_mallocs = int(0)
)
[unsafe]
pub fn malloc(n int) byteptr {
if n <= 0 {
panic('malloc(<=0)')
}
$if prealloc {
//println('p')
res := g_m2_ptr
unsafe {
g_m2_ptr += n
}
nr_mallocs++
return res
} $else {
ptr := unsafe {C.malloc(n)}
if ptr == 0 {
panic('malloc($n) failed')
}
return ptr
}
/*
TODO
#ifdef VPLAY
if n > 10000 {
panic('allocating more than 10 KB is not allowed in the playground')
}
#endif
#ifdef DEBUG_ALLOC
total_m += n
println('\n\n\nmalloc($n) total=$total_m')
print_backtrace()
#endif
*/
}
//#include <malloc/malloc.h>
//fn malloc_size(b byteptr) int
[unsafe]
pub fn v_realloc(b byteptr, n int) byteptr {
$if prealloc {
unsafe {
new_ptr := malloc(n)
size := 0 //malloc_size(b)
C.memcpy(new_ptr, b, size)
return new_ptr
}
} $else {
ptr := unsafe {C.realloc(b, n)}
if ptr == 0 {
panic('realloc($n) failed')
}
return ptr
}
}
[unsafe]
pub fn v_calloc(n int) byteptr {
return C.calloc(1, n)
}
[unsafe]
pub fn vcalloc(n int) byteptr {
if n < 0 {
panic('calloc(<=0)')
} else if n == 0 {
return byteptr(0)
}
return C.calloc(1, n)
}
[unsafe]
pub fn free(ptr voidptr) {
$if prealloc {
return
}
C.free(ptr)
}
pub fn memdup(src voidptr, sz int) voidptr {
if sz == 0 {
return vcalloc(1)
}
unsafe {
mem := malloc(sz)
return C.memcpy(mem, src, sz)
}
}
fn v_ptr_free(ptr voidptr) {
$if prealloc {
return
}
C.free(ptr)
}
pub fn is_atty(fd int) int {
$if windows {
mut mode := u32(0)
osfh := voidptr(C._get_osfhandle(fd))
C.GetConsoleMode(osfh, voidptr(&mode))
return int(mode)
} $else {
return C.isatty(fd)
}
}
fn __as_cast(obj voidptr, obj_type int, expected_type int) voidptr {
if obj_type != expected_type {
panic('as cast: cannot cast $obj_type to $expected_type')
}
return obj
}
// VAssertMetaInfo is used during assertions. An instance of it
// is filled in by compile time generated code, when an assertion fails.
pub struct VAssertMetaInfo {
pub:
fpath string // the source file path of the assertion
line_nr int // the line number of the assertion
fn_name string // the function name in which the assertion is
src string // the actual source line of the assertion
op string // the operation of the assertion, i.e. '==', '<', 'call', etc ...
llabel string // the left side of the infix expressions as source
rlabel string // the right side of the infix expressions as source
lvalue string // the stringified *actual value* of the left side of a failed assertion
rvalue string // the stringified *actual value* of the right side of a failed assertion
}
fn __print_assert_failure(i &VAssertMetaInfo) {
eprintln('${i.fpath}:${i.line_nr+1}: FAIL: fn ${i.fn_name}: assert ${i.src}')
if i.op.len > 0 && i.op != 'call' {
eprintln(' left value: ${i.llabel} = ${i.lvalue}')
if i.rlabel == i.rvalue {
eprintln(' right value: $i.rlabel')
}
else {
eprintln(' right value: ${i.rlabel} = ${i.rvalue}')
}
}
}
pub struct MethodArgs {
pub:
typ int
}
pub struct FunctionData {
pub:
name string
attrs []string
args []MethodArgs
return_type int
typ int
}
pub struct FieldData {
pub:
name string
attrs []string
is_pub bool
is_mut bool
typ int
}